1. Evolution: is a change over time.

2. Genetic Variation: All the different sets
of genetic information
of all the organisms in
a population.

3. Mutation: A change that affects an organism’s genetic code.

4. Natural Selection: A
process in which
organisms that are
best suited to their
environment survive
to reproduce and pass
on their traits to their offspring.

5. Adaptation: Any trait that improves an organism's chances for survival and reproduction.

6. Extinction: The disappearance of all individuals of a species.

7. The preserved remains or trace of an organism that lived in a past age.
Fossil:

8. Paleontologist: A scientist who studies fossils to learn about organisms that existed in the past.

9. Body Fossil: The fossilized remains of an organism or part of an organism.

10. Petrification: A form of fossilization in which the organic material of a dead organism is replaced with minerals.

11. Carbonization: A process in which water, oils, and gases are squeezed out of a decaying organism, leaving only a layer of carbon.

12. Mold: A fossil formed when an organism decays, leaving a cavity in firm sediment.

13. Cast: A fossil formed when a mold left by a decayed organism is filled with minerals or sediment.

14. Trace Fossil: Evidence of
the activities of a dead
organism, such as a
preserved footprint.